EP4051886A1 - An exhaust pipe for exhaust gas of an internal combustion engine of a vehicle - Google Patents

An exhaust pipe for exhaust gas of an internal combustion engine of a vehicle

Info

Publication number
EP4051886A1
EP4051886A1 EP20800739.3A EP20800739A EP4051886A1 EP 4051886 A1 EP4051886 A1 EP 4051886A1 EP 20800739 A EP20800739 A EP 20800739A EP 4051886 A1 EP4051886 A1 EP 4051886A1
Authority
EP
European Patent Office
Prior art keywords
curved
exhaust
section
exhaust pipe
exhaust gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20800739.3A
Other languages
German (de)
French (fr)
Other versions
EP4051886C0 (en
EP4051886B1 (en
Inventor
Franciscus Thomas Everardus JANSSEN
Jemil Gael ZNAIEN
Nils GOETELEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DAF Trucks NV
Original Assignee
DAF Trucks NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DAF Trucks NV filed Critical DAF Trucks NV
Publication of EP4051886A1 publication Critical patent/EP4051886A1/en
Application granted granted Critical
Publication of EP4051886C0 publication Critical patent/EP4051886C0/en
Publication of EP4051886B1 publication Critical patent/EP4051886B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/082—Other arrangements or adaptations of exhaust conduits of tailpipe, e.g. with means for mixing air with exhaust for exhaust cooling, dilution or evacuation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2270/00—Mixing air with exhaust gases
    • F01N2270/02—Mixing air with exhaust gases for cooling exhaust gases or the apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2470/00—Structure or shape of exhaust gas passages, pipes or tubes
    • F01N2470/18—Structure or shape of exhaust gas passages, pipes or tubes the axis of inlet or outlet tubes being other than the longitudinal axis of apparatus

Definitions

  • the invention relates to an exhaust pipe for exhaust gas of an internal combustion engine of a vehicle, said vehicle having a bottom, said exhaust pipe having an exhaust gas passage for passing exhaust gas, said exhaust pipe having a circular inlet opening, in use, capable of being in exhaust receiving communication with an exhaust system of the vehicle; an outlet opening for discharging exhaust gas into the surroundings external to the vehicle, and a curved exhaust pipe section positioned between the circular inlet opening and the outlet opening, wherein an inner surface of a first annular portion of the curved exhaust pipe section gradually changes from a convex circular section to an indented concavely curved section in a direction from the inlet opening towards the outlet opening, for - in use - creating turbulence or a vortex in the exhaust gas flowing through the curved exhaust pipe section of the exhaust gas passage, wherein the curved exhaust pipe section comprises a curved inside pipe section and a curved outside pipe section, the curved inside pipe section having a smaller radius of curvature than the curved outside pipe section.
  • the exhaust pipe known from WO2017116326A1 comprises an inner pipe in flow communication with the combustion engine, an outlet enclosure having a semi-closed structure leading to an exhaust gases outlet plane which is oriented to extend parallel to the road surface on which the vehicle moves (and thus parallel to the bottom of the vehicle) and a connection element joining the inner pipe and the outlet enclosure while creating air intake gaps for intaking environmental air contributing to the temperature drop of the exhaust gas streams.
  • the outlet enclosure comprises a curved exhaust pipe section having a curved inside pipe section and a curved outside pipe section, the curved inside pipe section having a smaller radius of curvature than the curved outside pipe section.
  • the outlet enclosure has a first lobe and a second lobe separated by an inwardly projecting and downwardly expanding deflection portion which is arranged in the curved outside pipe section.
  • This deflection portion is structured to directly face and receive gas streams coming from the inlet pipe in the manner that, due to an asymmetry of the first and second lobes with respect to each other, separate vortices are created to cool the temperature of the exhaust gases.
  • the air from the environment mixes with the exhaust gas, whereby the temperature of the exhaust gas, in particular at an exhaust gas outlet or an outlet region of the exhaust pipe, can be reduced.
  • the invention provides an exhaust pipe for exhaust gas of an internal combustion engine of a vehicle, said vehicle having a bottom, said exhaust pipe having an exhaust gas passage for passing exhaust gas, said exhaust pipe having a circular inlet opening, in use, capable of being in exhaust receiving communication with an exhaust system of the vehicle; an outlet opening for discharging exhaust gas into the surroundings external to the vehicle, and a curved exhaust pipe section positioned between the circular inlet opening and the outlet opening, wherein an inner surface of a first annular portion of the curved exhaust pipe section gradually changes from a convex circular section to an indented concavely curved section in a direction from the inlet opening towards the outlet opening, for - in use - creating turbulence or a vortex in the exhaust gas flowing through the curved exhaust pipe section of the exhaust gas passage, wherein the curved exhaust pipe section comprises a curved inside pipe section and a curved outside pipe section, the curved inside pipe section having a smaller radius of curvature than the curved outside pipe section, characterized in that the
  • an inner surface of at least one second annular portion of the curved outside pipe section gradually changes from a circular section to a planar section in a direction from the inlet opening towards the outlet opening.
  • the inner surface of the outlet opening comprises the indented concavely curved section, and three planar sections, the indented concavely curved section and the planar sections being connected by convexly curved sections.
  • an exhaust pipe for exhaust gas of an internal combustion engine of a vehicle defines an outlet plane, which outlet plane extends transverse to the bottom of the vehicle, and the exhaust pipe comprises a downwardly directed exhaust deflection portion extending from a top of the outlet opening for directing exhaust gases away from the bottom of the vehicle.
  • the exhaust gases can be directed away from the bottom of the vehicle, thereby preventing that hot exhaust gases come into contact with components of the vehicle.
  • Figure 1 schematically shows an embodiment of an exhaust pipe for exhaust gas of an internal combustion engine of a vehicle according to the invention in a side perspective view;
  • Figure 2 schematically shows a cross section of a part of the exhaust pipe for exhaust gas of an internal combustion engine of a vehicle shown in Fig. 1;
  • Figure 3 schematically shows the embodiment of an exhaust pipe for exhaust gas of an internal combustion engine of a vehicle of Fig 1 in an end perspective view;
  • Figure 4 schematically shows the embodiment of an exhaust pipe for exhaust gas of an internal combustion engine of a vehicle of Fig 1 in an perspective view shown along the line IV- IV of Fig. 1; and Figure 5 schematically shows the gradual change from a convex circular section to an indented concavely curved section in a direction from the inlet opening towards the outlet opening of the curved exhaust pipe section of the embodiment of the exhaust pipe shown in Fig. 1.
  • FIG. 1 an embodiment of an exhaust pipe 1 for exhaust gas of an internal combustion engine of a vehicle according to the invention is schematically shown in a side perspective view.
  • the exhaust pipe 1 has an inner surface 1A and an exhaust gas passage 2 (see Fig. 2) for passing exhaust gas enclosed by the inner surface 1A of the exhaust pipe 1.
  • the exhaust gas passage 2 extends from a circular inlet opening 3 of the exhaust pipe 1 to an outlet opening 4 for discharging exhaust gas into the surroundings external to the vehicle.
  • the circular inlet opening 3 is, in use, capable of being in exhaust receiving communication with an exhaust system of the vehicle.
  • a curved exhaust pipe section 5 is positioned between the circular inlet opening 3 and the outlet opening 4.
  • the curved exhaust pipe section 5 comprises a curved inside pipe section 6 and a curved outside pipe section 7.
  • the curved inside pipe section 6 has a smaller radius of curvature than the curved outside pipe section 7.
  • the curved exhaust pipe section 5 comprises a first annular portion 6A forming a part of the annular circumference of the curved exhaust pipe section 5.
  • the inner surface of the first annular portion 6A of the curved exhaust pipe section 5 gradually changes from a convex circular section at a location 6A1 near the inlet opening 3 to an indented concavely curved section at a location 6A2 which latter location 6A2 is positioned further from the inlet opening 3 than the location 6A1 in a direction from the inlet opening 3 towards the outlet opening 4 as is schematically indicated in Figures 3 and 5, in which the indented concavely curved section is indicated by the reference numeral 6B.
  • the first annular portion 6A of the curved exhaust pipe section 5 is positioned on the curved inside pipe section 6.
  • the cross-section of the curved exhaust pipe section 5 is further configured such that an inner surface of at least one second annular portion of the curved outside pipe section 7 gradually changes from a circular convex section to a planar section 6C in a direction from the inlet opening 3 towards the outlet opening 4.
  • a planar section 6C is indicated in Figs. 1, 3 and 4.
  • the planer shape of the section 6C is clearly visible in the Figures 3 and 4 near the outlet opening 4, however the change of the circular sectional shape to a planar shape starts in the curved exhaust pipe section 5.
  • the change of the internal shape of the exhaust pipe starting in the curved exhaust pipe section 5 is such that at the outlet opening 4 the inner surface of the outlet opening 4 comprises the indented concavely curved section 6B, and three planar sections 6C, 6D, 6E, wherein the indented concavely curved section 6B and the planar sections 6C, 6D, 6E are connected by convexly curved sections 8A, 8B, 8C, 8D.
  • the exhaust pipe 1 comprises a downwardly directed exhaust deflection portion 9 extending from a top 10 of the outlet opening 4.
  • the exhaust gases can be directed away from the bottom of the vehicle (not shown but with regard to the Figures positioned above the exhaust pipe 1), which bottom of the vehicle extends parallel to the road surface on which the vehicle moves, thereby preventing that hot exhaust gases come into contact with components of the vehicle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Abstract

An exhaust pipe 1 for exhaust gas of an internal combustion engine of a vehicle has an exhaust gas passage for passing exhaust gas. The exhaust pipe has a circular inlet opening 3 which, in use, is capable of being in exhaust receiving communication with an exhaust system of the vehicle. An outlet opening 4 of the exhaust pipe discharges exhaust gas into the surroundings external to the vehicle. The exhaust pipe comprises a curved exhaust pipe section 5 positioned between the circular inlet opening 3 and the outlet opening 4. The curved exhaust pipe section 5 comprises a curved inside pipe section 6 having a smaller radius of curvature than a curved outside pipe section 7. The first annular portion 6A of the curved exhaust pipe section 5 of which the inner surface gradually changes from a convex circular section 6A1 to an indented concavely curved section 6A2 in a direction from the inlet opening 3 towards the outlet opening 4 is positioned on the curved inside pipe section 6, for - in use - creating turbulence or a vortex in the exhaust gas flowing through the curved exhaust pipe section 5 of the exhaust gas passage 2.

Description

Title: An exhaust pipe for exhaust gas of an internal combustion engine of a vehicle
The invention relates to an exhaust pipe for exhaust gas of an internal combustion engine of a vehicle, said vehicle having a bottom, said exhaust pipe having an exhaust gas passage for passing exhaust gas, said exhaust pipe having a circular inlet opening, in use, capable of being in exhaust receiving communication with an exhaust system of the vehicle; an outlet opening for discharging exhaust gas into the surroundings external to the vehicle, and a curved exhaust pipe section positioned between the circular inlet opening and the outlet opening, wherein an inner surface of a first annular portion of the curved exhaust pipe section gradually changes from a convex circular section to an indented concavely curved section in a direction from the inlet opening towards the outlet opening, for - in use - creating turbulence or a vortex in the exhaust gas flowing through the curved exhaust pipe section of the exhaust gas passage, wherein the curved exhaust pipe section comprises a curved inside pipe section and a curved outside pipe section, the curved inside pipe section having a smaller radius of curvature than the curved outside pipe section.
Such an exhaust pipe for a vehicle is known from WO2017116326A1. The exhaust pipe known from WO2017116326A1 comprises an inner pipe in flow communication with the combustion engine, an outlet enclosure having a semi-closed structure leading to an exhaust gases outlet plane which is oriented to extend parallel to the road surface on which the vehicle moves (and thus parallel to the bottom of the vehicle) and a connection element joining the inner pipe and the outlet enclosure while creating air intake gaps for intaking environmental air contributing to the temperature drop of the exhaust gas streams. The outlet enclosure comprises a curved exhaust pipe section having a curved inside pipe section and a curved outside pipe section, the curved inside pipe section having a smaller radius of curvature than the curved outside pipe section. The outlet enclosure has a first lobe and a second lobe separated by an inwardly projecting and downwardly expanding deflection portion which is arranged in the curved outside pipe section. This deflection portion is structured to directly face and receive gas streams coming from the inlet pipe in the manner that, due to an asymmetry of the first and second lobes with respect to each other, separate vortices are created to cool the temperature of the exhaust gases. Thus, in the exhaust pipe known from WO2017116326A1 the air from the environment mixes with the exhaust gas, whereby the temperature of the exhaust gas, in particular at an exhaust gas outlet or an outlet region of the exhaust pipe, can be reduced. However, there is a constant desire in the field to improve the reduction of temperature of exhaust gas, in particular during burning off soot of a soot filter. This burning off process usually takes place under driving conditions of the vehicle, however in some cases this burning off process is performed or has to be finished during a stand still operation. During the stand still operation however the ambient air flow around the exhaust pipe to cool down the exhaust gasses to an acceptable low level might be insufficient even when the known exhaust pipe is used.
It is thus an object of the present invention to provide an alternative exhaust pipe for exhaust gas of an internal combustion engine of a vehicle with which the temperature of exhaust gases can be reduced sufficiently even in a stand still operation.
In order to achieve this object the invention provides an exhaust pipe for exhaust gas of an internal combustion engine of a vehicle, said vehicle having a bottom, said exhaust pipe having an exhaust gas passage for passing exhaust gas, said exhaust pipe having a circular inlet opening, in use, capable of being in exhaust receiving communication with an exhaust system of the vehicle; an outlet opening for discharging exhaust gas into the surroundings external to the vehicle, and a curved exhaust pipe section positioned between the circular inlet opening and the outlet opening, wherein an inner surface of a first annular portion of the curved exhaust pipe section gradually changes from a convex circular section to an indented concavely curved section in a direction from the inlet opening towards the outlet opening, for - in use - creating turbulence or a vortex in the exhaust gas flowing through the curved exhaust pipe section of the exhaust gas passage, wherein the curved exhaust pipe section comprises a curved inside pipe section and a curved outside pipe section, the curved inside pipe section having a smaller radius of curvature than the curved outside pipe section, characterized in that the first annular portion of the curved exhaust pipe section of which the inner surface gradually changes from a convex circular section to an indented concavely curved section in a direction from the inlet opening towards the outlet opening is positioned on the curved inside pipe section. It has appeared that by providing the first annular portion of the curved exhaust pipe section on the curved inside pipe section a strong turbulence is created in the exhaust gas flow which is efficient in reducing the temperature of the exhaust gases discharged from the exhaust pipe even in a stand still operation.
In a further embodiment of an exhaust pipe for exhaust gas of an internal combustion engine of a vehicle according to the invention an inner surface of at least one second annular portion of the curved outside pipe section gradually changes from a circular section to a planar section in a direction from the inlet opening towards the outlet opening. By further providing the inner surface of at least one second annular portion with a gradually change in shape from a circular section to a planar section in a direction from the inlet opening towards the outlet opening the turbulence created in the exhaust gas flow is increased thereby still further improving reduction of the temperature of the exhaust gases discharged from the exhaust pipe. It has appeared that reduction of the temperature of the exhaust gases discharged from the exhaust pipe is sufficient in most operational circumstances when at the outlet opening the inner surface of the outlet opening comprises the indented concavely curved section, and three planar sections, the indented concavely curved section and the planar sections being connected by convexly curved sections.
In a still further embodiment of an exhaust pipe for exhaust gas of an internal combustion engine of a vehicle according to the invention the outlet opening defines an outlet plane, which outlet plane extends transverse to the bottom of the vehicle, and the exhaust pipe comprises a downwardly directed exhaust deflection portion extending from a top of the outlet opening for directing exhaust gases away from the bottom of the vehicle. As a result of the downwardly directed exhaust deflection portion the exhaust gases can be directed away from the bottom of the vehicle, thereby preventing that hot exhaust gases come into contact with components of the vehicle.
The invention will be further explained with reference to the Figures, in which non-limiting exemplary embodiments of a according to the invention are shown:
Figure 1 schematically shows an embodiment of an exhaust pipe for exhaust gas of an internal combustion engine of a vehicle according to the invention in a side perspective view;
Figure 2 schematically shows a cross section of a part of the exhaust pipe for exhaust gas of an internal combustion engine of a vehicle shown in Fig. 1;
Figure 3 schematically shows the embodiment of an exhaust pipe for exhaust gas of an internal combustion engine of a vehicle of Fig 1 in an end perspective view;
Figure 4 schematically shows the embodiment of an exhaust pipe for exhaust gas of an internal combustion engine of a vehicle of Fig 1 in an perspective view shown along the line IV- IV of Fig. 1; and Figure 5 schematically shows the gradual change from a convex circular section to an indented concavely curved section in a direction from the inlet opening towards the outlet opening of the curved exhaust pipe section of the embodiment of the exhaust pipe shown in Fig. 1.
In Figure 1 an embodiment of an exhaust pipe 1 for exhaust gas of an internal combustion engine of a vehicle according to the invention is schematically shown in a side perspective view. The exhaust pipe 1 has an inner surface 1A and an exhaust gas passage 2 (see Fig. 2) for passing exhaust gas enclosed by the inner surface 1A of the exhaust pipe 1. The exhaust gas passage 2 extends from a circular inlet opening 3 of the exhaust pipe 1 to an outlet opening 4 for discharging exhaust gas into the surroundings external to the vehicle. The circular inlet opening 3 is, in use, capable of being in exhaust receiving communication with an exhaust system of the vehicle.
A curved exhaust pipe section 5 is positioned between the circular inlet opening 3 and the outlet opening 4. The curved exhaust pipe section 5 comprises a curved inside pipe section 6 and a curved outside pipe section 7. As is e.g. clearly shown in Fig. 2 the curved inside pipe section 6 has a smaller radius of curvature than the curved outside pipe section 7.
The curved exhaust pipe section 5 comprises a first annular portion 6A forming a part of the annular circumference of the curved exhaust pipe section 5. As seen from outside of the exhaust pipe the inner surface of the first annular portion 6A of the curved exhaust pipe section 5 gradually changes from a convex circular section at a location 6A1 near the inlet opening 3 to an indented concavely curved section at a location 6A2 which latter location 6A2 is positioned further from the inlet opening 3 than the location 6A1 in a direction from the inlet opening 3 towards the outlet opening 4 as is schematically indicated in Figures 3 and 5, in which the indented concavely curved section is indicated by the reference numeral 6B. According to the invention the first annular portion 6A of the curved exhaust pipe section 5 is positioned on the curved inside pipe section 6. As a result of the change from a convex circular section to an indented concavely curved section in the exhaust gas flowing through the curved exhaust pipe section 5 of the exhaust gas passage 2 a turbulence or vortex is created which is efficient in reducing the temperature of the exhaust gases discharged from the exhaust pipe even in a stand still operation.
In the embodiments shown in the Figures the cross-section of the curved exhaust pipe section 5 is further configured such that an inner surface of at least one second annular portion of the curved outside pipe section 7 gradually changes from a circular convex section to a planar section 6C in a direction from the inlet opening 3 towards the outlet opening 4. Such a planar section 6C is indicated in Figs. 1, 3 and 4. The planer shape of the section 6C is clearly visible in the Figures 3 and 4 near the outlet opening 4, however the change of the circular sectional shape to a planar shape starts in the curved exhaust pipe section 5.
In the embodiments shown in Figures 1, 3 and 4 the exhaust pipe 1 for exhaust gas of an internal combustion engine of a vehicle according to claim 3 the change of the internal shape of the exhaust pipe starting in the curved exhaust pipe section 5 is such that at the outlet opening 4 the inner surface of the outlet opening 4 comprises the indented concavely curved section 6B, and three planar sections 6C, 6D, 6E, wherein the indented concavely curved section 6B and the planar sections 6C, 6D, 6E are connected by convexly curved sections 8A, 8B, 8C, 8D. It has appeared that by using the embodiment shown in these Figures the created turbulence in the exhaust gas flow as a result of the change of inner shape of the exhaust gas passage from a circular cross-section near the inlet opening 3 to the shape with three planar sections 6C, 6D, 6E and an indented concave section 6B connected by convex curved section (8A-8D) as clearly shown in Fig. 4 ensures a sufficient reduction of the temperature of the exhaust gases discharged from the exhaust pipe 1. The change of internal shape of the exhaust pipe 1 takes place at the curved exhaust pipe section 5 and preferably is completed at a distance spaced from the outlet opening 4.
In Figs. 1, 3 and 4 it is shown that the exhaust pipe 1 comprises a downwardly directed exhaust deflection portion 9 extending from a top 10 of the outlet opening 4. As a result of the downwardly directed exhaust deflection portion 9 the exhaust gases can be directed away from the bottom of the vehicle (not shown but with regard to the Figures positioned above the exhaust pipe 1), which bottom of the vehicle extends parallel to the road surface on which the vehicle moves, thereby preventing that hot exhaust gases come into contact with components of the vehicle.

Claims

Claims
1. An exhaust pipe for exhaust gas of an internal combustion engine of a vehicle, said vehicle having a bottom, said exhaust pipe having an exhaust gas passage for passing exhaust gas, said exhaust pipe having a circular inlet opening, in use, capable of being in exhaust receiving communication with an exhaust system of the vehicle; an outlet opening for discharging exhaust gas into the surroundings external to the vehicle, and a curved exhaust pipe section positioned between the circular inlet opening and the outlet opening, wherein an inner surface of a first annular portion of the curved exhaust pipe section gradually changes from a convex circular section to an indented concavely curved section in a direction from the inlet opening towards the outlet opening, for - in use - creating turbulence or a vortex in the exhaust gas flowing through the curved exhaust pipe section of the exhaust gas passage, wherein the curved exhaust pipe section comprises a curved inside pipe section and a curved outside pipe section, the curved inside pipe section having a smaller radius of curvature than the curved outside pipe section, characterized in that the first annular portion of the curved exhaust pipe section of which the inner surface gradually changes from a convex circular section to an indented concavely curved section in a direction from the inlet opening towards the outlet opening is positioned on the curved inside pipe section.
2. An exhaust pipe for exhaust gas of an internal combustion engine of a vehicle according to claim 1, characterized in that an inner surface of at least one second annular portion of the curved outside pipe section gradually changes from a circular section to a planar section in a direction from the inlet opening towards the outlet opening.
3. An exhaust pipe for exhaust gas of an internal combustion engine of a vehicle according to claim 2, characterized in that at the outlet opening the inner surface of the outlet opening comprises the indented concavely curved section, and three planar sections, the indented concavely curved section and the planar sections being connected by convexly curved sections.
4. An exhaust pipe for exhaust gas of an internal combustion engine of a vehicle according to any one of the preceding claims, characterized in that the outlet opening defines an outlet plane, which outlet plane extends transverse to the bottom of the vehicle, and in that the exhaust pipe comprises a downwardly directed exhaust deflection portion extending from a top of the outlet opening for directing exhaust gases away from the bottom of the vehicle.
EP20800739.3A 2019-10-29 2020-10-27 An exhaust pipe for exhaust gas of an internal combustion engine of a vehicle Active EP4051886B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2024114A NL2024114B1 (en) 2019-10-29 2019-10-29 An exhaust pipe for exhaust gas of an internal combustion engine of a vehicle
PCT/NL2020/050663 WO2021086177A1 (en) 2019-10-29 2020-10-27 An exhaust pipe for exhaust gas of an internal combustion engine of a vehicle

Publications (3)

Publication Number Publication Date
EP4051886A1 true EP4051886A1 (en) 2022-09-07
EP4051886C0 EP4051886C0 (en) 2023-10-18
EP4051886B1 EP4051886B1 (en) 2023-10-18

Family

ID=69106130

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20800739.3A Active EP4051886B1 (en) 2019-10-29 2020-10-27 An exhaust pipe for exhaust gas of an internal combustion engine of a vehicle

Country Status (3)

Country Link
EP (1) EP4051886B1 (en)
NL (1) NL2024114B1 (en)
WO (1) WO2021086177A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57145718U (en) * 1981-03-09 1982-09-13
US8001775B2 (en) * 2005-08-16 2011-08-23 Daimler Trucks North America Llc Vehicle exhaust dilution and dispersion device
WO2013095205A1 (en) * 2011-12-22 2013-06-27 Volvo Lastvagnar Ab Exhaust colling apparatus
BR112018013466A2 (en) * 2015-12-30 2018-12-04 Ford Otomotiv Sanayi As Structurally improved vehicle exhaust dilution and dispersion device
DE102016005852A1 (en) 2016-05-12 2017-02-16 Daimler Ag Exhaust pipe for guiding exhaust gas of an internal combustion engine, in particular for a motor vehicle

Also Published As

Publication number Publication date
EP4051886C0 (en) 2023-10-18
EP4051886B1 (en) 2023-10-18
WO2021086177A1 (en) 2021-05-06
NL2024114B1 (en) 2021-07-19

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